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Ecological Core Concepts -- Ecosystems -- Food webs and trophic cascades

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View Resource A wolf (Canis lupus) in the snow in Banff National Park, which was recolonized by wolves in the 1980s.

The Bow Valley in Banff National Park, Canada, was recolonized by wolves (Canis lupus) in the mid-1980s, although wolves did not establish themselves in areas near the growing town of Banff. This...

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http://www.esajournals.org/doi/abs/10.1890/04-1269
View Resource An Antarctic starfish (Odontaster validus) climbs over an Antarctic scallop (Adamisium colbecki).

An Antarctic starfish (Odontaster validus) climbs over an Antarctic scallop (Adamisium colbecki) in the coastal Ross Sea. Antarctic starfish are omnivores with a wide range of potential prey and an...

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View Resource An Arctic fox (Alopex lagopus) captures a Least Auklet (Aethia pusilla) in the Aleutian Islands.

During the 100-150 years since they were introduced to the Aleutian Islands, the Arctic fox (Alopex lagopus) and Norway rat (Rattus norvegicus) have extirpated native seabirds from most of the...

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http://www.esajournals.org/doi/abs/10.1890/05-0496
View Resource An in-class role-playing activity to foster discussion and deeper understanding of biodiversity and ecological webs

In a general sense, biodiversity is an intuitively simple concept, referring to the variety of Earth’s organisms. Ecologists, however, conceptualize biodiversity in a more nuanced, multidimensional...

View Resource Enhancing science teachers' understanding of ecosystem interactions with qualitative conceptual models

The project described in this article explores how a series of conceptual ecological models can be used to portray the improvement in ecological understanding over the span of a short course. The...

View Resource Issues in Ecology, Issue 04: Biodiversity and Ecosystem Functioning

In this report, biodiversity and its relevance to the ecosystems that support humanity is discussed. Ecosystem functioning is defined as the collective activities of all biota within an ecosystem...

View Resource Issues in Ecology, Issue 05: Biotic Invasions

This report is an introduction to exotic species invasions. An exotic species becomes invasive, when it proliferates unchecked across the region in which it was introduced. The transformation from...

View Resource Long-term Response of an Arctic River Community to Phosphorus Fertilization

With this TIEE Data Set, students assess effects of phosphorus addition on algae, moss, mayflies, and arctic grayling fish in the Kuparuk River, in the foothills of the North Slope of Alaska. Data...

http://tiee.esa.org/vol/v3/issues/data_sets/arc/abstract.htm...
View Resource NCEP Exercise- Ecological Consequences of Extinctions: Ecological Decay in Isolated Forest Fragments

In order to examine the effects of extinction on an ecosystem, this exercise simulates a real life example in Venezuela. Students imagine they are working for a Non-Governmental Organization...

View Resource Of wolves, elk and willows: how predation structures ecosystems

Predator-prey interactions are among the most familiar and important in ecology, and they are also fraught with common misconceptions for students and the lay public. The notion of potential indirect...

http://tiee.esa.org/vol/v6/figure_sets/trophic_cascades/abst...
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